Retrieve a video generation task (OpenAI Video alias)

{
    "id": "task_abc123def456",
    "task_id": "task_abc123def456",
    "object": "video",
    "model": "doubao-seedance-2-0-260128",
    "status": "queued",
    "progress": 100,
    "created_at": 1712345678,
    "completed_at": 1712345900,
    "expires_at": 1712432300,
    "metadata": {
        "url": "https://cdn.volcengineapi.com/videos/output-abc123.mp4"
    },
    "error": {
        "code": "content_policy_violation",
        "message": "The request violated the content safety policy."
    },
    "remixed_from_video_id": "task_origin789ghi012"
}